Obe seduction mill



J. w. HIGBY 1,911,568

ORE REDUCTION MILL Filedy May s, 1952 s sheeisv-sheet 1 May 30, 1933.

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May 3o, 1933. J.W.H`1GBY 1,911,568

ORE REDUCTION MILL Filed May 3, 1932 3 Sheets-Sheet 2 j P7 Inventor 36./sepizzgy,

,llorney May 30, 1933. J. w. HIGBY ORE REDUCTION MILL Filed May 5. 19323 Sheets-Sheet 3 O O O O O O O O O OOOOOOOOO OOOOOOOOO Invenlor Mwe/fiaWEZ/y2@ man.

Home y Patented May 3o, 1933 vra'iulftNr OFFICE" JOSEPH W. HIGBY, OFCLAR-XSTON, WAYSINGTON OBE REDUCTION MILL Application led May 3, 1932.Serial No. 608,979.

' class.

My primary aim is to generally improve u upon machines of this class byproviding one possessing certain noteworthy and appreciable wearresisting features especially suitable and practica toA promote powerand force and to materially enhance the value 2 of the ore reducingcharacteristics ofthe improved mill.

The explicit structuralimprovemen will -become more readily apparentfrom the following description and drawings.

In the drawings:

Figure 1 is a view in section and elevation of an ore grinding millconstructed in accordance with the principles of this invention.

Figure 2 is a top plan view thereof.

Figure 3 is a section taken approximately on the plane of the line 3--3of Figure 2.

Figure 4 is a fragmentary plan view of the material discharge trough.

Figure 5 is a plan view of a. renewable wear collar.

Figure 6 is a lan view of the rotary bowl.

Figure 7 is a ragmentary elevational view of the separating screen.

The general assembly of the construction may well be seen as it isillustrated in Figure 1 of the drawings. Here the numeral 8 designates asuitable base having an end thrust bearing 9 and a superposed bearing 10to accommodate the perpendicular rotary shaft 11 of the rotor. The rotoris here shown asprovided Ywith a pulley 12 to accommodate a propulsionbelt or equivalent' driving element.

Detachably bolted on the upper end of the base is a casing 13 whosebottom 14 constltutes a divider or partition, the same being a 'providedwith a stuffing box 15 through and beyond which the shaft 11 extends.The shaft is fitted into a socket 16 on the bottom of the cup-like bowl17. The bottom 14 is formed with a water delivery duct or passage 18located below the bowl and at the intake end of the water passage is anipple or fitting 19 to accommodate the water "supply pipe (not shown).l

The numeral 20 designates a wear collar which is fitted telescopicallyintothe upper end of the bowl and provided with an overhanging beveledrim 21 seated on the upper edge of the wall of the bowl. The collar isprovided with circumferentially spaced lugs 22 alined with complementallugs 23 on the vbowl to accommodate the coupling and retaining links 24.This serves to hold the 0 collar removably in place in the bowl.

The collar has its rim portion terminating in a plane substantiall Hushwith a Wear ring 25 fastened to the fiange 26 of the upper end portionof the casing 13. The collar 75 and ring are spaced apart to provide apassage for the upwardly flowing column of water.

The numeral 27 designates that which may be distinguished as a receiverand this has a 8 flange 28 at its top to which several parts connect. Inthe first place, the flange 29 on the lower section 30 of the hopper issecured thereto. vMoreover, the annulus 31 which projects into thereceiver is secured thereto by the bolt 32. Incidently, the numerals 33designate spacing sleeves surrounding the bolt. Moreover, the numeral 34designates a separating screen which is clamped between 'y the annulus31 and the flange 29. The nu- 90 meral 35 designates the trough havinglugs 36 clamped in place by thesame bolts 32. This is a uniqueand'econornical assembly.

` The upper cap section of th hopper is distinguished by the numeral 37and has a coni- 95 cal receptacle portion 38 provided with a centralmaterial delivery hole 39.

Attention is invited to the trough 35 which surrounds the screenedoutlet 'and which is of appropriate depth and proportions and 10preferably formed with a stepped bottom, j the stepped portions beingdenoted by the numeral 40 as seen in Figures 3 and 4. Finally, thenumeral 41 designates the discharge 5 or'outlet of the trough whichconveys the dust ladenwater-to the desired point of deposit for recoverywork.

Particular attention is invited to the renewable collar 20 and theassociated renewable wear ring 25. These are the only parts which aresubject to excessive wear and they are therefore renewable for frequentexchange purposes. Another' feature to be emphasized is the arrangementwherein the collar and ring are spaced apart to provide an annular slotthrough which thecolumn of Water rises. Moreover, introduction of thewater beneath the bowl 23 is believed to be important in that itaccomplishesy the flotation step properly and promotes expeditiousseparation and recovery Work.

A highly important feature yetto be mentioned 1s the arrangement whereinthe ore is banked as indicated at the points 42 and 43. These depositsof ore or bther material build up in the approximate manner illustratedin dotted lines and serve as wear banks materially saving the adjacentparts which as obvious are subjected to rapid deterioration from thecentrifugal rock fiowing process developed by the rotation of the bowl.

It is manifest that the ore or other mate rial to be ground isintroduced through the hopper inlet hole 39 and collect in the bowl 17which is directly therebeneath. When the machine is started, thecentrifugal force builds the wear resisting banks 42 and 43. Obviously,by 'properly supplyin water from beneath the rotating bowl and gyrotating the bowl at an excessive speed, the desired pressing andmilling effects are accomplished. Incidently, the ring 31 constitutes anabutment or ledge which projects beneath the screen and protects thescreen against excessive damage. Hence it is in a sense a guard member.

By adoptin and utilizing this simplified combination o mechanical parts,I have obviously developed a mill which will do the work satisfactorilyand provide results beyond expectation. It is eviden-t that any suitableamalgamation and recovery steps may be used for accumulatingandsalvafging precious metals from the ore.

Particularly do I wish to emphasize the water-proofing arrangement ofthe base, the sturdy rotatable mounting for the rotor, and theperfection in the closing of the rotor together with the Water-deliverymeans for injectin the'water under pressure at a point below t e bowl ofthe rotor, allowing the Water to rise between the bowl and casing sothat it may elevate into the hopper unit. In fact, it is evident thatthe structure as herein devised and described is destined to betterfulfill the requirements of a mill of this class in that it promotesexpeditious output,

is light in weight, yet sturdy, portable for transportation purposes,and repair, and otllierwise well fitted to insure gratifying resu ts.

It is thought that the description taken in connection with the drawingswill enable a clear understanding of the invention to be had. Therefore,a more lengthy description is thought unnecessary.

While the referred embodiment of the invention has een shown anddescribed, it is to be understood that minor changes coming within thefield of invention claimed may be resorted to if desired.

I claim 1. In a grinding mill of the class described, a base providedwith bearings, a casing sup'- ported on said base, a rotor including ashaft journalled for rotation in said bearings and extending into thecasing, a bowl embodied in said rotor and supported inthe casing on theupper end of the shaft, a removable wear collar fitted' into the vupperportion of the bowl, a wear ring supported on the upper end of thecasing and spaced from the adjacent marginal portion of the collar, ahopper supported from the casing and enclosing the ring and collar, saidhopper including upper and lower sections, and a separate screen mountedin the hopper between said sections, and a material receiving troughsupported from the hopper adjacent said screen.

2. An ore reduction mill of the class described comprising va baseprovided with bearings, a casing supported on said base and providedwith a centrally elevated bottom having a stuffing box and a waterdelivery passage, a shaft mounted in the bearings and extending upthrough the stuffing box and into the casing, a bowl supported on theupper end of the shaft and confined in said casing and having its wallspaced from the Wall of the casing to allow passage of the watertherebetween, a renewable wear collar fitted telescopically into thebowl,.a wear ring surrounding the collar in spaced relation andsupported on said casing, a receiver attached to the upper endof thecasing, a hopper including upper and lower sections, the lower sectionbeing formed with an outstanding circumferential flange, the upper endof said receiver having a flange matched with said first-named flange,an abutment annulus attached to said lastnamed flange and extending intothe receiver, a screen clamped between the abutment annulus and saidfirst-named flange.

3. An ore reduction mill of the class described comprising a baseprovided with bearings, a casing supported on saidbase and having acentrally elevated bottom formed with a central stuffing box and anadjacent water delivery passage, a shaft mounted in the bearings andextending up through the stufling box and into the casing, a bowlsupport-ed on the upper end of the shaft and substantially confined insaid casing and having its wall spaced from the wall ot' the casing toallow passage of the water between said walls, a renewable wear collarfitted telescopically into the bowl, a wear ring surrounding the collarin spaced relation supported on said casing, a receiver attached to theupper end of the casing, a hopper including upper and lower sections,the lower section being formed with an outstanding circumferentialflange, the upper end of said receiver having a flange matched with saidfirst-named flange, an abutment annulus attached to said last-namedflange and extending into the receiver, a screen clamped between theabutment annulus and said first-named flange, together withI a troughsurrounding the receiver and having apertured ears bolted between saidflanges, said trough being located in a plane to receive the overflowmaterial passing through said screen.

V4. An ore handling and reduction mill of,^ the class describedcomprising a base equipped with bearings, an open top casing supportedon said base and providedwith a centrally arranged elevated portionhaving a stufling box and a radial open-ended water delivery duct, ashaft mounted for rotation in the base and extending up through thestuffing box into the casing, a material receiving bowl confined in saidcasing and attached to the upper protrudin end of said shaft, thebowl'being spaced rom the cas'- ing to allow water to pass therebetween,a collar fitted telescopically and removably in saidbowl and having anoverhanging ledge resting on the upper edge of the wall of the bowl,said rim having a bevelled surface, a wear ring supported on said casingnand spaced from said rim to provide a restrictf' ed annular slot forpassage'of the water, la receiver removably attached to the u per endportion -of the casing and of a 1ameter greater than the casing, saidreceiver having a flange at its top, a hopper including an upper sectionhaving a depressed centrally apertured portion, and a lower section,said lower section having a flange matching the flange on said receiver,bolts passing through said flanges, spacing sleeves surrounding thebolts and spacing the flanges apart, an abutment and guard annulussecured to the firstnamed flange by said bolt and extending into thereceiver, an annular screen clamped between said annulus andsecond-named flange. 5. An ore handling and reduction 4mill of the classdescribed comprising' a base equipped with bearings, an open to casingsupported on said base and provide with a centrally arranged elevatedportion having ,ses

bowl and having an overhanging ledge resting on the upper edge of' thewall of the bowl. sa1d rim having a bevelled surface, a wearringsupported on said casing and spaced from said rim to provide arestricted annular slot for passage of the water, a .receiverremovablyattached to the upper end portion of the casing and of adiameter greater than the casing, said receiver having a flange at itstop, a hopper including an upper section having a depressed centrallyapertured portion, and a lower section, said lower section having aflange matching the flange on -said receiver, bolts passing through saidflanges, spacing sleeves surrounding the bolts and spacing the flangesapart, an abutment and guard annulus secured tothe first-named flange bysaid bolt and extending into the receiver, an annular screen clampedbetween said annulus and second-named flange, together with an annulartrough having its inner wall provided with Aapertured Vears secured tosaid bolts between said flanges. i

In 'testimony whereof I affix my signature.

JOSEPH W. HIGBY.

